US Patent 9670722 Lever arm assembly for a window covering

An apparatus for installing a window covering is disclosed. In one embodiment, such an apparatus includes a stationary portion for attachment to an end of a headrail of a window covering, and a moveable portion to contact an inside of a window casing. A crankshaft is provided that, when rotated, translates the moveable portion relative to the stationary portion. A lever arm is provided to rotate the crankshaft member. A corresponding method is also disclosed and claimed herein.